Abstract

Results of studies on the microstructure of plane sheet specimens after their impact loading at different rates are discussed. Near the notch tips, in the area of localized strain, several layers of different microstructure were revealed. The formation of fine grains is assumed to be determined by the process of dynamic recrystallization at increased local temperatures due to intensive plastic deformation. The boundaries between the layers of different microstructure as well as increased pore concentrations in the area of localized strain near the outer surface point to the realization of the three-dimensional stress-strain state in the material.

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